Kooji Aizawa

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Hitachi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Bearing unit, drainage pump and hydraulic turbine each incorporatin...
- Patent number 5,839,880
- Issue date Nov 24, 1998
- Hitachi, Ltd.
- Ryoji Okada
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Drainage pump and a hydraulic turbine incorporating a bearing membe...
- Patent number 5,458,460
- Issue date Oct 17, 1995
- Hitachi, Ltd.
- Ryoji Okada
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Vertical shaft type pump
- Patent number 5,297,927
- Issue date Mar 29, 1994
- Hitachi, Ltd.
- Kooji Aizawa
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Submersible thrust bearing apparatus
- Patent number 5,035,519
- Issue date Jul 30, 1991
- Hitachi, Ltd.
- Kooji Aizawa
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...